At customs, you must show your passport with a valid F1 student visa and I-20 form. This is where you get access to the US! On the plane to the United States, you may be asked to complete a blue form for the U.S. Customs Service. To fill out this form you need your passport, student visa, and your flight details. It is important that you write down the address of your university and where you will be staying the first night, so have that to hand.